Robert Downey Jr and Jon Favreau have revealed that filming Iron Man 3 in the wake of The Avengers may present a number of difficulties, especially in terms of the storyline.

The Cowboys & Aliens director was joined by Downey Jr at the Hero Complex Film Festival in Hollywood on Sunday for a screening of the first two Iron Man movies. According to Slash Film, the two spoke about the future of the Iron Man franchise, focusing on how the release of The Avengers will affect Iron Man 3.

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"I guess in comics you can say that it's an individual storyline and you can break it off into a group," said Favreau. "But in movies, it's hard not to take into consideration what just happened. What are you gonna say? 'They all just lost their cell phones and you can't get help?' So it's going to take a lot of ingenuity to make it make sense to a mainstream film audience as well as a comic book audience."

Downey Jr went on to state that Favreau will still help with the storyline for Iron Man 3.

"There's going to be this kind of conglomerate of efforts," Downey Jr said.

The Sherlock Holmes star also opened up about shooting The Avengers, revealing his enthusiasm for the ensemble cast.

"I just thought, 'How are you gonna put all of us clowns together? He's wearing a suit, he's all jacked up, he's so and so and poor Mark Ruffalo, he's gonna out do us'. And we're about six weeks in and I have to say Joss Whedon is nailing it," Downey Jr said. "He's so smart and so good. And it's gonna be great. I can't believe I just said it, I never could've believed this but it's gonna be great."